1. Alvim R, Hewett EW, Saunders PF (1976) Seasonal variation in hormone content of willow.1. Changes in abscisic acid content and cytokinin activity in xylem sap. Plant Physiol 57:474–476
2. Alvim R, Saunders PF, Barros RS (1979) Abscisic acid and the photoperiodic induction of dormancy in Salix viminalis L. Plant Physiol 63:774–777
3. Andersson A, Keskitalo J, Sjodin A, Bhalerao R, Sterky F, Wissel K, Tandre K, Aspeborg H, Moyle R, Ohmiya Y, Brunner A, Gustafsson P, Karlsson J, Lundeberg J, Nilsson O, Sandberg G, Strauss S, Sundberg B, Uhlen M, Jansson S, Nilsson P (2004) A transcriptional timetable of autumn senescence. Genome Biol 5(R24):21–13
4. Arihan O, Guvenc A (2011) Studies of the anatomical structure of stems of willow (Salix L.) species (Salicacea) growing in Ankara Province, Turkey. Turk J Bot 35:1–17
5. Bao YH, Dharmawardhana P, Mockler TC, Strauss SH (2009) Genome scale transcriptome analysis of shoot organogenesis in Populus. BMC Plant Biol 9(132)